fix webapp opening in termux

Open real url not html shim since android and file:// urls is a nasty
kettle of fish.

This commit was sponsored by John Pellman on Patreon.

Assistant/WebApp/Configurators/Local.hs

@@ -38,6 +38,7 @@ import Config
 import Utility.Gpg
 import qualified Remote.GCrypt as GCrypt
 import qualified Types.Remote
+import Utility.Android
 
 import qualified Data.Text as T
 import qualified Data.Map as M
@@ -144,10 +145,6 @@ defaultRepositoryPath firstrun = do
 	legit d = not <$> doesFileExist (d </> "git-annex")
 #endif
 
--- Detect when the Linux build is running on Android, eg in termux.
-osAndroid :: IO Bool
-osAndroid = ("Android" == ) <$> readProcess "uname" ["-o"]
-
 newRepositoryForm :: FilePath -> Hamlet.Html -> MkMForm RepositoryPath
 newRepositoryForm defpath msg = do
 	(pathRes, pathView) <- mreq (repositoryPathField True) (bfs "")

Command/WebApp.hs

@@ -31,6 +31,7 @@ import qualified Annex
 import Config.Files
 import Upgrade
 import Annex.Version
+import Utility.Android
 
 import Control.Concurrent
 import Control.Concurrent.STM
@@ -207,24 +208,32 @@ openBrowser mcmd htmlshim realurl outh errh = do
 
 openBrowser' :: Maybe FilePath -> FilePath -> String -> Maybe Handle -> Maybe Handle -> IO ()
 #ifndef __ANDROID__
-openBrowser' mcmd htmlshim _realurl outh errh = runbrowser
+openBrowser' mcmd htmlshim realurl outh errh =
+	ifM osAndroid
+		{- Android does not support file:// urls well, but neither
+		 - is the security of the url in the process table important
+		 - there, so just use the real url. -}
+		( runbrowser realurl
+		, runbrowser (fileUrl htmlshim)
+		)
 #else
 openBrowser' mcmd htmlshim realurl outh errh = do
-	recordUrl url
+	recordUrl realurl
 	{- Android's `am` command does not work reliably across the
 	 - wide range of Android devices. Intead, FIFO should be set to 
 	 - the filename of a fifo that we can write the URL to. -}
 	v <- getEnv "FIFO"
 	case v of
-		Nothing -> runbrowser
+		Nothing -> runbrowser realurl
 		Just f -> void $ forkIO $ do
 			fd <- openFd f WriteOnly Nothing defaultFileFlags
-			void $ fdWrite fd url
+			void $ fdWrite fd realurl
 			closeFd fd
 #endif
   where
-	p = case mcmd of
-		Just c -> proc c [htmlshim]
+	runbrowser url = do
+		let p = case mcmd of
+			Just c -> proc c [url]
 			Nothing -> 
 #ifndef mingw32_HOST_OS
 				browserProc url
@@ -235,15 +244,6 @@ openBrowser' mcmd htmlshim realurl outh errh = do
 				(browserProc (takeFileName htmlshim))
 					{ cwd = Just (takeDirectory htmlshim) } 
 #endif
-#ifdef __ANDROID__
-	{- Android does not support file:// urls, but neither is
-	 - the security of the url in the process table important
-	 - there, so just use the real url. -}
-	url = realurl
-#else
-	url = fileUrl htmlshim
-#endif
-	runbrowser = do
 		hPutStrLn (fromMaybe stdout outh) $ "Launching web browser on " ++ url
 		hFlush stdout
 		environ <- cleanEnvironment

Utility/Android.hs

@@ -0,0 +1,14 @@
+{- Android stuff
+ -
+ - Copyright 2018 Joey Hess <id@joeyh.name>
+ -
+ - License: BSD-2-clause
+ -}
+
+module Utility.Android where
+
+import Common
+
+-- Detect when the Linux build is running on Android, eg in termux.
+osAndroid :: IO Bool
+osAndroid = ("Android" == ) <$> readProcess "uname" ["-o"]

doc/todo/termux_package/comment_3_a60b6e4511c1df23d76c6e6e8028eeaa._comment

@@ -21,11 +21,12 @@ The webapp is able to open an url (after I upgraded termux) via xdg-open
 chrome was not able to access, apparently a permissions problem. The
 webapp.html does not add any security on android, since it's not a
 multiuser unix system, and so it should open the url to the webapp
-directly.
+directly. (Done)
 
 Accessing the sdcard may need termux-setup-storage to be run once, 
 depending on the version of android. That sets up $HOME/storage.
 The webapp ought to default to making a repository somewhere in there.
+(Done)
 
 webbapp won't start on boot, but could be made to using https://wiki.termux.com/wiki/Termux:Boot
 

git-annex.cabal

@@ -1000,6 +1000,7 @@ Executable git-annex
     Upgrade.V4
     Upgrade.V5
     Utility.Aeson
+    Utility.Android
     Utility.Applicative
     Utility.AuthToken
     Utility.Base64